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Design of RC sinusoidal oscillator based on active building blocks
Režňák, Patrik ; Šotner, Roman (oponent) ; Kartci, Aslihan (vedoucí práce)
Thesis is focused on RC oscillators employing active building blocks and operational amplifiers. In the beginning, review of available literature talking about this topic is done. Different building blocks and circuits containing those blocks are picked and some of them simulated with PSpice and SNAP programs. Oscillation creation and influence of circuit components is verified. Those circuits are realized in practical application and simulation results are compared to those gained from real world circuits, also the chosen circuits are compared between each other.
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Analog Implementation of Fractional-Order Elements and Their Applications
Kartci, Aslihan ; Štork, Milan (oponent) ; Machado,, José Tenreiro (oponent) ; Brančík, Lubomír (vedoucí práce)
With advancements in the theory of fractional calculus and also with widespread engineering application of fractional-order systems, analog implementation of fractional-order integrators and differentiators have received considerable attention. This is due to the fact that this powerful mathematical tool allows us to describe and model a real-world phenomenon more accurately than via classical “integer” methods. Moreover, their additional degree of freedom allows researchers to design accurate and more robust systems that would be impractical or impossible to implement with conventional capacitors. Throughout this thesis, a wide range of problems associated with analog circuit design of fractional-order systems are covered: passive component optimization of resistive-capacitive and resistive-inductive type fractional-order elements, realization of active fractional-order capacitors (FOCs), analog implementation of fractional-order integrators, robust fractional-order proportional-integral control design, investigation of different materials for FOC fabrication having ultra-wide frequency band, low phase error, possible low- and high-frequency realization of fractional-order oscillators in analog domain, mathematical and experimental study of solid-state FOCs in series-, parallel- and interconnected circuit networks. Consequently, the proposed approaches in this thesis are important considerations in beyond the future studies of fractional dynamic systems.
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Analog Implementation of Fractional-Order Elements and Their Applications
Kartci, Aslihan ; Štork, Milan (oponent) ; Machado,, José Tenreiro (oponent) ; Brančík, Lubomír (vedoucí práce)
With advancements in the theory of fractional calculus and also with widespread engineering application of fractional-order systems, analog implementation of fractional-order integrators and differentiators have received considerable attention. This is due to the fact that this powerful mathematical tool allows us to describe and model a real-world phenomenon more accurately than via classical “integer” methods. Moreover, their additional degree of freedom allows researchers to design accurate and more robust systems that would be impractical or impossible to implement with conventional capacitors. Throughout this thesis, a wide range of problems associated with analog circuit design of fractional-order systems are covered: passive component optimization of resistive-capacitive and resistive-inductive type fractional-order elements, realization of active fractional-order capacitors (FOCs), analog implementation of fractional-order integrators, robust fractional-order proportional-integral control design, investigation of different materials for FOC fabrication having ultra-wide frequency band, low phase error, possible low- and high-frequency realization of fractional-order oscillators in analog domain, mathematical and experimental study of solid-state FOCs in series-, parallel- and interconnected circuit networks. Consequently, the proposed approaches in this thesis are important considerations in beyond the future studies of fractional dynamic systems.
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Current-Mode Multifunctional Filter Utilizing Losses of Inductor Simulator
Kartci, Aslihan
In this paper, a simple configuration for simulating the inductance using voltage differencing current conveyor (VDCC) as an active element has been presented. The proposed inductance simulator circuit uses only one VDCC, one current amplifier (CA), and one grounded capacitor. The equivalent value of the realized simulator can be tuned electronically through the transconductance parameter and current gain of the VDCC and current gain through the CA. The proposed circuit behavior together with its application is demonstrated using PSPICE simulations with commercially active devices. Functionality of the proposed circuit is verified through its application in the second-order circuit. The circuit that behaves as a filter, has one input and standard three output responses such as low-pass filter (LPF), band-pass filter (BPF), and high-pass filter (HPF).
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Design of RC sinusoidal oscillator based on active building blocks
Režňák, Patrik ; Šotner, Roman (oponent) ; Kartci, Aslihan (vedoucí práce)
Thesis is focused on RC oscillators employing active building blocks and operational amplifiers. In the beginning, review of available literature talking about this topic is done. Different building blocks and circuits containing those blocks are picked and some of them simulated with PSpice and SNAP programs. Oscillation creation and influence of circuit components is verified. Those circuits are realized in practical application and simulation results are compared to those gained from real world circuits, also the chosen circuits are compared between each other.
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Design of RC sinusoidal oscillator based on active building blocks
Režňák, Patrik ; Šotner, Roman (oponent) ; Kartci, Aslihan (vedoucí práce)
Thesis is focused on RC oscillators employing active building blocks and operational amplifiers. In the beginning, review of available literature talking about this topic is done. Different building blocks and circuits containing those blocks are picked and some of them simulated with PSpice and SNAP programs. Oscillation creation and influence of circuit components is verified. Those circuits are realized in practical application and simulation results are compared to those gained from real world circuits, also the chosen circuits are compared between each other.
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